Cryptographic issues in Samba

1) Cryptographic issues

EUVDB-ID: #VU32623

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-4476

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

Samba 4.0.x before 4.0.11 and 4.1.x before 4.1.1, when LDAP or HTTP is provided over SSL, uses world-readable permissions for a private key, which allows local users to obtain sensitive information by reading the key file, as demonstrated by access to the local filesystem on an AD domain controller.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Samba: 4.0.0 - 4.0.10

CPE2.3

• cpe:2.3:a:samba:samba:4.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.6:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.8:*:*:*:*:*:*:*
• cpe:2.3:a:samba:samba:4.0.9:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-updates/2013-11/msg00083.html
https://lists.opensuse.org/opensuse-updates/2013-12/msg00088.html
https://security.gentoo.org/glsa/glsa-201502-15.xml
https://www.samba.org/samba/history/samba-4.0.11.html
https://www.samba.org/samba/history/samba-4.1.1.html
https://www.samba.org/samba/security/CVE-2013-4476

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.